WCN6885 crashes on Xperia 1 IV

[Konrad Dybcio]

Hi Kalle, Dmitry

I recently got Wi-Fi to work on my SM8450 Sony Xperia 1 IV (with the 
help of Dmitry), but I can only get it to function using very old CrOS 
firmware [1]. Linux-next fw breaks for me in the same way that it did 
for Dmitry here [2]. There is however also the fw shipped with the phone 
(not sure how redistributable it is, you can extract it from the OTA [3] 
update by running simg2img from android-tools and mounting it. You will 
find it in image/):

- amss20.bin (renamed to amss.bin)
- m3.bin
- board.e[0-9af] (Dmitry gave me a hint that I should choose board.e8d 
based on the reported board_id; renamed to board.bin)
- regdb.bin

Using this set of firmwares I get a veeery long and unpleasant set of 
crashes [4].

Any ideas where to start tackling this?


Konrad

[1] 
https://chromium.googlesource.com/chromiumos/third_party/linux-firmware/+/d233ddd89abe06448070471963a58c0a7da81d79/ath11k/WCN6855/hw2.0

[2] https://bugzilla.kernel.org/show_bug.cgi?id=215987

[3] 
https://drive.google.com/file/d/1gBkKplxUJuoUab71HMTLdf55jIl-ieoH/view?usp=share_link

[4] https://pastebin.com/ZF8ks51p